Commonly pairs with nouns for things that can be divided or experienced in common: responsibility, goal, interest, experience, understanding, space, resources.
常見錯誤
We have a sharing kitchen.
We have a shared kitchen.
'sharing' is a verb form, not an adjective; use 'shared' to describe something jointly used.
They have same culture.
They have a shared culture.
'same' alone can sound incomplete; 'shared' emphasises community.